Re: COPY from temp table to main table insted of INSERT INTO

On Tue, Jul 11, 2017 at 9:45 AM, Stephen Froehlich <
s(dot)froehlich(at)cablelabs(dot)com> wrote:

> I tend to do mass inserts to my database, but INSERT INTO is taking quite
> a while for 100k values.
>
>
>
> What is the syntax for using the COPY command to copy a well formatted
> temp table to the “end” of the primary table? I am having trouble
> understanding https://www.postgresql.org/docs/9.5/static/sql-copy.html.
>
>
>
​Tables don't have beginnings or ends.

Are you intending to use client software to access the source data or are
you planning on putting the source data in a location where the server o/s
user can see it?​

If you already have an actual temporary table inside the database you
wouldn't use COPY. COPY is intended to transfer data from/to an external
file (including stdin/stdout).

Generally:

(in psql)
BEGIN;
CREATE TEMP TABLE tmptbl ( cols );
\copy tmptbl from '/tmp/file-to-load.csv' with ( ... )
INSERT INTO tbl SELECT * FROM tmptbl;
COMMIT;

\copy in psql constructs an appropriate "COPY" SQL command, executes it on
the server, and then funnels the contents of "file" to the server.

David J.